Extract kArcEnabled preference from ArcSessionManager part 1.

chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc

Index: chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc
diff --git a/chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc b/chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc
index 79be422c34d293381368a8a5948180168c4de701..46687431e3afcac62eb91ef5618c173a7eeede4a 100644
--- a/chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc
+++ b/chrome/browser/chromeos/arc/fileapi/arc_file_system_operation_runner.cc
@@ -9,6 +9,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/optional.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "chrome/browser/chromeos/arc/arc_util.h"
 #include "components/arc/arc_bridge_service.h"
 #include "content/public/browser/browser_thread.h"
 #include "url/gurl.h"
@@ -161,8 +162,11 @@ void ArcFileSystemOperationRunner::OnInstanceClosed() {
 
 void ArcFileSystemOperationRunner::OnStateChanged() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
-  SetShouldDefer(ArcSessionManager::Get()->IsArcPlayStoreEnabled() &&
-                 !arc_bridge_service()->file_system()->has_instance());
+  // TODO(hidehiko): Revisit the condition, when ARC is running without
+  // profile.
+  SetShouldDefer(

[hidehiko, 2017/02/17 15:07:19]

FYI (off-topic): yusukes@.
On ARC login screen work, this may be considered.
This module conceptually expects that ARC is tied to primary Profile, but on
login screen, primary profile is not prepared.

[Yusuke Sato, 2017/02/17 22:27:09]

Acknowledged.

+      IsArcPlayStoreEnabledForProfile(ArcSessionManager::Get()->profile()) &&
+      !arc_bridge_service()->file_system()->has_instance());
 }
 
 void ArcFileSystemOperationRunner::SetShouldDefer(bool should_defer) {